abysmalimmeasurably deep or extreme, fathomless: an abysmal misunderstandingNot to be confused with:abyssal ? relating to the great depths of the oceansAbused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embreea·bys·mal (?-b?z?m?l)adj.1. Resembling an abyss in depth; unfathomable.2. Very profound; limitless: abysmal misery.3. Very bad: an abysmal performance.a·bys?mal·ly adv.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.abysmal (??b?zm?l) adj1. immeasurable; very great: abysmal stupidity. 2. informal extremely bad: an abysmal film. a?bysmally advCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014a?bys?mal (??b?z m?l) adj. 1. of or like an abyss; immeasurably deep or great: abysmal ignorance. 2. extremely or hopelessly bad or severe: abysmal weather. [1650?60] a?bys?mal?ly, adv. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.